she's with us from there live tonight. hey natalie, good evening. >> reporter: good evening to you, brian. this ia 24-7 rescue operation with drill teams working around the clock, trying to dig tunnels to the trapped miners and officials y they're on track and making good progress for an earlier than expected rescue. nearly half mile below ground, th33 miners are trying to get on with their subterranean existence, now in itseventh week. their lifeline till now has been a ree-inch shaft bringing them delivery tubes of food, water, medicine and vitamins. ey survive on 2,500 calorie diet high in protein. to maintain some normalcy, they mimic a routine of day and night with lamps. physically, though thinner, all are reportedly in good condition. they're in good health and have no illnesses related to being under ground, says the doctor who treats them. they have been able to shower with fresh water in the mine and are even exercising with a personal trainer via a video teleconference hookup. work also keeps them busy. they've